diff --git a/tests/raytrace/Eval.hs b/tests/raytrace/Eval.hs
index 3ce24e4b3beb6c5ca7dfb0a80fcc09a59609cea6..bd9d419400af8be3b65a0bec201b6af69437ddb5 100644
--- a/tests/raytrace/Eval.hs
+++ b/tests/raytrace/Eval.hs
@@ -5,6 +5,7 @@
 
 module Eval where
 
+import Control.Monad
 import Data.Array
 
 import Geometry
@@ -22,9 +23,16 @@ class Monad m => MonadEval m where
 
 newtype Pure a = Pure a deriving Show
 
+instance Functor Pure where
+    fmap = liftM
+
+instance Applicative Pure where
+    pure = Pure
+    (<*>) = ap
+
 instance Monad Pure where
     Pure x >>= k = k x
-    return       = Pure
+    return       = pure
     fail s       = error s
 
 instance MonadEval Pure where
@@ -248,7 +256,7 @@ doPrimOp primOp op args
       types = getPrimOpType primOp
 
 
--- Render is somewhat funny, becauase it can only get called at top level.
+-- Render is somewhat funny, because it can only get called at top level.
 -- All other operations are purely functional.
 
 doAllOp :: PrimOp -> GMLOp -> Stack -> IO Stack
@@ -286,11 +294,18 @@ newtype Abs a   = Abs { runAbs :: Int -> AbsState a }
 data AbsState a = AbsState a !Int
                 | AbsFail String
 
+instance Functor Abs where
+    fmap = liftM
+
+instance Applicative Abs where
+    pure x = Abs (\ n -> AbsState x n)
+    (<*>) = ap
+
 instance Monad Abs where
     (Abs fn) >>= k = Abs (\ s -> case fn s of
 			           AbsState r s' -> runAbs (k r) s'
                                    AbsFail m     -> AbsFail m)
-    return x     = Abs (\ n -> AbsState x n)
+    return       = pure
     fail s       = Abs (\ n -> AbsFail s)
 
 instance MonadEval Abs where
@@ -325,7 +340,7 @@ mainEval prog = do { stk <- eval (State emptyEnv [] prog)
                              }
 -}
 
-done = "Items still on stack at (successfull) termination of program"
+done = "Items still on stack at (successful) termination of program"
 
 ------------------------------------------------------------------------------
 -- testing
diff --git a/tests/raytrace/test.T b/tests/raytrace/test.T
index 882fce2c7b721be1739e5892846ad9e88f1be0a7..a65423cf68058c54be79153e74c085d41ca566f8 100644
--- a/tests/raytrace/test.T
+++ b/tests/raytrace/test.T
@@ -2,8 +2,15 @@ setTestOpts([omit_ways(['ghci']), when(fast(), skip)])
 
 hpc_prefix = "perl ../hpcrun.pl --clear --exeext={exeext} --hpc={hpc}"
 
-test('hpc_raytrace', \
-	[ when(fast(), skip), cmd_prefix(hpc_prefix), reqlib('parsec') ], \
-	multimod_compile_and_run, \
-	['Main','-fhpc -package parsec'])
+# TODO. It is unclear what the purpose of this test is. It produces lots of
+# output, but the expected output file is missing. I (thomie) added
+# the ignore_output setup function, just to make the test pass for the
+# moment.
+# Note that the subdirectory tixs also has a test.T file, and those tests
+# depend on some of the files in this directory.
+# Also note that testsuite/tests/programs/galois_raytrace has a similar (but
+# not the same) copy of this program.
+test('hpc_raytrace',
+     [cmd_prefix(hpc_prefix), reqlib('parsec'), ignore_output],
+     multimod_compile_and_run, ['Main','-fhpc -package parsec'])